Director/PDMR Shareholding

SOFTWARE RADIO TECHNOLOGY PLC                         

                           ("SRT" or the "Company")                            

                         Director / PDMR Shareholding                          

Further to the announcement made earlier today, SRT announces that it has
received notification that Simon Rogers, Chairman of the Company, has completed
the sale of 2,200,000 ordinary shares of 0.1p each at a price of 40p per share
as a result of institutional demand. Following the sale Mr. Rogers holds
14,783,900 ordinary shares representing 14.1 per cent of the issued share
capital of the Company as enlarged by the placing announced today which is
scheduled to complete on 16 November 2010.

Enquiries:                                                                   
                                                                             
Software Radio Technology plc                                    01761 409500
                                                                             
Simon Tucker / Richard Hurd                                                  
                                                                             
Westhouse Securities Limited                                    0113 246 2610
                                                                             
Tim Feather / Matthew Johnson                                                
                                                                             
Leander PR                                                       07795 168157
                                                                             
Christian Taylor-Wilkinson                                                   
                                                                             

About SRT

Software Radio Technology plc, develops advanced radio communications
technologies which are used to create enabling modules and OEM products. SRT
Marine Technology Limited focuses on VHF and AIS technologies for use in
navigation and homeland security identification and tracking applications. SRT
Marine Technology provides its solutions in a variety of module and OEM product
formats.